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ID 25940
file
creator
Baoa, Gang
subject
Cr depletion
IGC/IGSCC susceptibility
Inconel 182
LSM
precipitation
NDC
Metal and mining engineering
abstract
Thermodynamic and kinetic modeling was conducted to simulate Cr depletion profiles near grain boundaries in Inconel 182 during heat treatments and laser surface melting (LSM) using Thermo-Calc and DICTRA code. The effect of Nb addition was also considered in the modeling. Based on the good agreement with Cr concentration distributions during the heat treatments measured experimentally, Cr depletion profiles adjacent to grain boundaries during the heat treatments and the LSM process were modeled. The Cr depletion profiles were evaluated using the Cr depletion area below the critical Cr concentration for IGC/IGSCC (Intergranular Cracking/Intergranular Stress Corrosion Cracking) susceptibility (12 mass%). Compared with the result of the Streicher test, the calculated Cr depletion areas showed good agreement with IGC/IGSCC susceptibilities. The sample after stress relief (SR) treatment had the largest Cr depletion area and showed the poorest IGC/IGSCC resistance. Cr depletion showed some recovery during subsequent low temperature sensitization (LTS). The sample after the LSM process had the smallest Cr depletion area and showed the best IGC/IGSCC resistance.
journal title
Journal of Materials Processing Technology
volume
Volume 209
issue
Issue 1
start page
416
end page
425
date of issued
2009-01-01
publisher
Elsevier Science S.A.
issn
0924-0136
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
Copyright (c) 2008 Published by Elsevier B.V.
relation url
department
Graduate School of Engineering